Face mask



FIG. 1 is a front and right side perspective view showing my new design for a face mask;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines shown in the drawings illustrate environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a face mask, as shown. 